If we discovered aliens and they were humanoid, what explanations might we provide to explain it?

Two arms, two eyes, two legs, bipedal, human-like vocals, and other such parallels. If these were our aliens, what would our scientists come up with to explain it? If possible, try to present more than one possible explanation. Details, too, are always appreciated. :)

Submitted October 26, 2020 at 07:40PM by TheRealShibaLoaf https://ift.tt/2HFXte6